Argentiometric methods

Argentiometric procedures cut across the classification boundaries to some extent, in that volumetric, gravimetric or colorimetric methods may be applied to the analysis of particular silver salts. However, the argentiometric methods for the determination of phosgene are specific to the chloride ion, and as such are susceptible to other chloride impurities (especially dichlorine or hydrogen chloride). The details of these methods have been reviewed elsewhere [1255], and since they are neither specific to phosgene, nor in any obvious way amenable to automation, they will not be reviewed here. 

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Octyl nitrite. C8H17O2N, Mol. Wt. 159-2, is determined either gaso-metrically as under ethyl nitrite above, using 3 ml of a dilution of 5 ml to 100 ml with 90 per cent ethanol (1 ml moist nitric oxide at 15 5 and normal pressure = 0 0066 g C8H17O2N) or by the argentiometric method on about 0-5 g of sample in 10 ml of 90 per cent ethanol in a stoppered flask (1 ml 0 1 N nitric acid = 0 04777 g). 

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